Average Weather in August in Mont Belvieu Texas, United States
Daily high temperatures are around 91°F, rarely falling below 85°F or exceeding 97°F. The highest daily average high temperature is 92°F on August 6.
Daily low temperatures are around 76°F, rarely falling below 71°F or exceeding 79°F.
For reference, on August 6, the hottest day of the year, temperatures in Mont Belvieu typically range from 76°F to 92°F, while on January 6, the coldest day of the year, they range from 46°F to 62°F.
Average High and Low Temperature in August
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in August
The month of August in Mont Belvieu experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 49% throughout the month. The highest chance of overcast or mostly cloudy conditions is 50% on August 20.
The clearest day of the month is August 31, with clear, mostly clear, or partly cloudy conditions 53% of the time.
For reference, on August 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 50%, while on October 26, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 69%.
Cloud Cover Categories in August
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Mont Belvieu, the chance of a wet day over the course of August is increasing, starting the month at 32% and ending it at 38%.
For reference, the year's highest daily chance of a wet day is 41% on June 24, and its lowest chance is 21% on April 15.
Probability of Precipitation in August
The average sliding 31-day rainfall during August in Mont Belvieu is rapidly increasing, starting the month at 2.9 inches, when it rarely exceeds 5.9 inches or falls below 0.8 inches, and ending the month at 4.3 inches, when it rarely exceeds 9.0 inches or falls below 1.3 inches.
The lowest average 31-day accumulation is 2.9 inches on August 1.
Average Monthly Rainfall in August
Over the course of August in Mont Belvieu, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 47 minutes, implying an average daily decrease of 1 minute, 33 seconds, and weekly decrease of 10 minutes, 54 seconds.
The shortest day of the month is August 31, with 12 hours, 47 minutes of daylight and the longest day is August 1, with 13 hours, 34 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in Mont Belvieu is 6:38 AM on August 1 and the latest sunrise is 17 minutes later at 6:56 AM on August 31.
The latest sunset is 8:12 PM on August 1 and the earliest sunset is 29 minutes earlier at 7:43 PM on August 31.
Daylight saving time is observed in Mont Belvieu during 2018, but it neither starts nor ends during August, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:19 AM and sets 14 hours, 4 minutes later, at 8:23 PM, while on December 21, the shortest day of the year, it rises at 7:10 AM and sets 10 hours, 14 minutes later, at 5:24 PM.
Sunrise & Sunset with Twilight in August
The chance that a given day will be muggy in Mont Belvieu is gradually decreasing during August, falling from 99% to 94% over the course of the month.
For reference, on July 20, the muggiest day of the year, there are muggy conditions 99% of the time, while on January 23, the least muggy day of the year, there are muggy conditions 5% of the time.
Humidity Comfort Levels in August
The average hourly wind speed in Mont Belvieu is essentially constant during August, remaining within 0.1 miles per hour of 6.2 miles per hour throughout.
For reference, on April 11, the windiest day of the year, the daily average wind speed is 9.1 miles per hour, while on August 15, the calmest day of the year, the daily average wind speed is 6.1 miles per hour.
The lowest daily average wind speed during August is 6.1 miles per hour on August 16.
Average Wind Speed in August
Wind Direction in August
Mont Belvieu is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Mont Belvieu is essentially constant during August, remaining around 86°F throughout.
The highest average surface water temperature during August is 86°F on August 16.
Average Water Temperature in August
The growing season in Mont Belvieu typically lasts for 11 months (334 days), from around January 26 to around December 26, rarely starting after March 6, or ending before November 29.
The month of August in Mont Belvieu is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in August
The average accumulated growing degree days in Mont Belvieu are very rapidly increasing during August, increasing by 943°F, from 4,122°F to 5,065°F, over the course of the month.
Growing Degree Days in August
The average daily incident shortwave solar energy in Mont Belvieu is gradually decreasing during August, falling by 0.6 kWh, from 5.9 kWh to 5.3 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in August
For the purposes of this report, the geographical coordinates of Mont Belvieu are 29.848 deg latitude, -94.891 deg longitude, and 36 ft elevation.
The topography within 2 miles of Mont Belvieu is essentially flat, with a maximum elevation change of 79 feet and an average elevation above sea level of 40 feet. Within 10 miles is also essentially flat (82 feet). Within 50 miles is essentially flat (341 feet).
The area within 2 miles of Mont Belvieu is covered by artificial surfaces (62%) and cropland (27%), within 10 miles by herbaceous vegetation (37%) and cropland (34%), and within 50 miles by herbaceous vegetation (27%) and cropland (25%).
This report illustrates the typical weather in Mont Belvieu year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Mont Belvieu.
For each station, the records are corrected for the elevation difference between that station and Mont Belvieu according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Mont Belvieu is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Mont Belvieu and a given station.
The stations contributing to this reconstruction are: Ellington Field (48%, 37 kilometers, southwest); George Bush Intercontinental Airport (33%, 48 kilometers, west); and Beaumont Municipal Airport (19%, 70 kilometers, east).
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Time zones for aiports and weather stations are provided by AskGeo.com .